The first two numbers are the fan tip degree.
The 25020 is the same as 2502.
Technically, the size would be 2502.0. (2.0 orifice size) so you can leave the last "0" off if you'd like.
Those tips will put you at around 3500-4000 PSI which will be kind of high for residential application. If you can get some, try the 25025's They'll lower your pressure down closer to 2500PSI.
How Do I find the Right Nozzle for My Pressure Washer? Which Tip Should I use? What Does Orifice Size mean? How do I Choose the Right Surface Cleaner? Knowing which size nozzle to use for your surface cleaner or pressure wand can be very confusing, especially for new contractors. Usually when...
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Try here:
https://washmart.com/products/pressure-washing-25-tips?variant=30253917274193
Washmart is a really reputable dealer out of houston and should be able to get you the right tips pretty quick.
I'd recommend giving them a call (Ask for Amber) and she could walk you through exactly what you need if you still want some more direction!